Cultivation techniques of rose

Roses are strong, regardless of soil, cold-resistant and drought-tolerant, and they are everywhere. Cuttings are generally used for propagation. As long as they are shaded and moisturized, the survival rate is above 90%. You can also press rattan branches into the soil during the growing period, cut them, and replant them after taking root. Sometimes grafting or sowing is also used.

liquid manure

Roses like to moisten but are afraid of dampness and avoid waterlogging. From germination to flowering, you can properly water more, and the soil is moist rather than waterlogged. After flowering, there should not be too much water and the soil should be dry and wet. Pay attention to drainage and flood prevention in rainy season.

Roses like fertilizers, but they also tolerate poverty. In March, liquid fertilizer mainly containing nitrogen can be applied 1 ~ 2 times to promote the growth of branches and leaves. Fertilizers mainly containing phosphorus and potassium can be applied for 2 ~ 3 times in April and May to promote more pregnant buds to blossom. After flowering, it can be fertilized again. Rose is a positive flower, which likes temperature and cold, and can safely overwinter outdoors in North China and its south area.

prune

Roses sprout vigorously and flourish. If not pruned in time, diseases and insect pests will easily occur under the conditions of sultry, humid, insufficient light and poor ventilation, so prune once after flowering. When pruning, you can choose semi-lignified robust branches of that year for cutting, put them in a semi-shady place, and transplant them in the next spring after survival, or cut off new buds with roots and replant them before germination in early spring. Rose is one of the world famous ornamental plants. It has a long history of cultivation in China. As early as 1630, Wang wrote Qunfangpu, 1688, Chen Haozi wrote secret glasses, 1708, and Wang Hao wrote Guangqunfangpu, all of which had roses, rose, rose.

/kloc-Before the 0/8th century, there were only several kinds of European roses, such as French roses, Venetian roses and Turkish roses, but there were no varieties with yellow flowers all the year round. 18- 19 years, China introduced roses, crossed with the original varieties, and cultivated varieties such as rose, perfume rose, wild rose and rose. Rosa plants have pleasant fragrance, and precious aromatic oil can be extracted from various petals. Commonly used varieties are Turkish rose, Chinese rose, Rosa davurica, wild rose, etc. The economic characters of 38 kinds of wild rose fruits were analyzed, and the contents of important vitamins such as VC, VE and carotene were determined. The VC content of different species of roses in this genus is quite different, with the highest content in Qinling (2576mg/ 100g) and the lowest content in Deqin (49mg/ 100g). The content of carotene is obviously different among varieties, among which the content of rose is the highest (19.24mg/ 100g) and that of Rosa roxburghii is the lowest (0.06mg/ 100g).

There was little difference in VE content among different varieties, ranging from1.34 mg100g (Rosa roxburghii) to 3.86mg/ 100g (Rosa bracteata). The statistical analysis of the contents of important vitamins in the fruits of 54 wild species of Rosa shows that there is a certain correlation between the contents of vitamins and the grouping, especially between the contents of Vc and the grouping, and the contents of VC in Guiwei group and Xiao Ye group are very high (the average values are higher than 1800 mg/ 100 g). The contents of He Zhu group, Rose group, Radix Aucklandiae group and Shuobao group were very low (the average values were all below 300mg/ 100g), and the contents of other species in celery leaf group were very low (the average values were 190mg/ 100g) except for the high content of VC in Rosa davurica. Carotene content is also related to grouping. The carotene content in Guiwei group, celery leaf group, columnar group and Shuobao group is higher, with an average of more than 6mg/ 100g. The contents of rose group, lobular group and radix aucklandiae group were lower, and the average value was below 0.4 mg/ 100 g.